Nasal breathing has crossed from the wellness corner of the internet into mainstream practice and the products and clinics that support it are growing faster than almost any segment of the health market. The most visible part of the trend is mouth tape, which is a small piece of medical adhesive worn across the lips during sleep to keep the mouth closed and force breathing through the nose. Sales of consumer mouth tape products tripled in 2025 according to retail data from Amazon and the specialty retailer Hostage Tape, and brand recognition for the category has climbed from 6 percent to 28 percent in the last 18 months. The interest is not limited to athletes or biohackers anymore.
The case for breathing through the nose rather than the mouth has been documented in respiratory and sleep medicine literature for decades. The nose conditions inhaled air, filters particulate, adds humidity, and produces nitric oxide that improves oxygen uptake in the lungs. Mouth breathing during sleep is associated with snoring, sleep apnea, dental issues, and morning fatigue. The Cleveland Clinic published a review in February that estimated 35 to 45 percent of American adults are habitual mouth breathers during sleep, and the rate among children with allergic rhinitis or enlarged adenoids is closer to 60 percent. The basic recommendation in most ENT practices is now to assess breathing pattern as part of a sleep workup.
The science that has driven the recent attention came from a 2020 book by James Nestor called Breath, which translated decades of older research and personal experimentation into a framework that was accessible. The book sold 2.4 million copies and put practices like nose breathing during exercise, slow breathing for stress regulation, and breath holds for cardiovascular conditioning into mainstream conversation. The follow up research has been mixed. Studies on slow breathing for blood pressure and heart rate variability have replicated. Studies on the cognitive benefits of carbon dioxide tolerance training have been smaller and less conclusive.
The clinical world has caught up enough that orofacial myofunctional therapy is now offered at most major dental and ENT practices in cities the size of Nashville and above. Myofunctional therapists work with patients on tongue posture, lip seal, and breathing patterns, and the practice is recognized by the American Academy of Sleep Medicine as a reasonable adjunct to CPAP or surgery for mild to moderate sleep apnea. Sessions run 60 to 90 minutes and a typical course is 12 to 24 sessions over six to nine months. Insurance coverage is inconsistent, with most plans treating it as out of network, though some Tennessee employer plans through BlueCross BlueShield have begun covering it.
Mouth tape is the entry point for most people and the product itself is simple. The medical adhesive holds the lips lightly closed during sleep without sealing them, which would be unsafe. Most products use a hypoallergenic adhesive on a fabric or porous backing and include a small vertical slit for breathing in case of nasal congestion during the night. The leading consumer brands are Hostage Tape, Somnifix, Mute Tape, and several private label products on Amazon. Pricing runs $20 to $35 per month for daily use. The clinical recommendation is to address nasal congestion first with saline rinses or allergy management before starting tape, since taping a fully obstructed nose is counterproductive.
The exercise application is what brought breath training to athletes and what has now spread to general fitness. Nose breathing during low to moderate intensity exercise is uncomfortable for most beginners and forces a slower pace, which is exactly the point. The training adaptation is improved CO2 tolerance and a more efficient breathing pattern at higher intensities. Most coaches who teach the practice recommend starting with 20 to 30 minutes of nose only walking or easy cycling and building up over six to twelve weeks. The runner and cycling communities have been doing this for years and the practice has now spread to strength athletes through the work of coaches like Brian Mackenzie.
The skeptical view from sleep medicine is that the trend has gotten ahead of the evidence on a few points. The claim that mouth tape solves sleep apnea is not supported and tape can be dangerous for people with severe untreated apnea, alcohol use, or chronic congestion. The claim that nose breathing during sleep alone fixes facial structure in adults is overstated. The research on children and craniofacial development is more compelling, but the adult evidence is more about quality of sleep, snoring reduction, and morning hydration than dramatic changes. The practical takeaway is that screening for nasal obstruction comes first.
For Nashville and the surrounding region, the practical resources are growing. The Vanderbilt Sleep Center has begun including breathing pattern assessment in its standard workup, and several dental practices in Brentwood, Franklin, and Murfreesboro now offer myofunctional therapy on staff. Local fitness coaches in run clubs and CrossFit affiliates have started incorporating nose breathing protocols into warmups. The trend is moving toward integration into standard health practice rather than staying in the supplement aisle, and the basic message has not changed: breathing through the nose during sleep, exercise, and rest is healthier than breathing through the mouth, and the path to that habit is more about removing obstructions than buying a product.